Induction of Parturition: A Comparison of the Effects of Lutalyse and Estrumate on Sows

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Abstract

The aim of this study was to determine the efficiency of prostaglandin analogue
treatments on the induction of parturition during late pregnancy in sows, based
on fewer and less intense side effects. Twenty-four sows were randomly treated
on day 114 of gestation with: (1) 175 micrograms Estrumate; (2) 10 mg
Lutalyse; (3) 2 ml. saline (control) or on day 115 with 2 ml saline (control).
Sows injected with Lutalyse showed a significant increase in position
changes/minute as compared to the C114 treatments. L114 treated sows
displayed a significant increase in frequency of bar biting compared to the E114,
C115, and C114 treatments, and a significant increase in frequency of defecation
compared to the C115 and C114 treatment. These results demonstrate that sows
treated with Estrumate are likely to have fewer, less intense side effects than
sows treated with Lutalyse.